N-((7-Chloro-5-(2-fluorophenyl)-2,3-dihydro-1H-benzo[e][1,4]diazepin-2-yl)methyl)acetamide-13C2 is an intermediate in the synthesis of Midazolam-13C2 the labeled analogue of Midazolam (M343000), an anesthetic; anticonvulsant; sedative; hypnotic.